She got involved in the Communist Party of Chile thanks to her husband's militant communism.
The circumstances leading to her suicide remain a mystery.
One theory is that 'Gracias a la Vida' is a foreshadowing of her suicide, though evidence supporting this are scant at best.

Why she might not be annoying

She and her siblings had to work to support the family upon her father's death when she was twelve. (1929)
Her daughter Rosita Clara died when she was performing in France. (1956)
She was also a prolific artist, making arpilleras (embroidery), oil paintings, and wire sculptures and exhibiting them in the Louvre. (April 1964)
Her children have inherited her artistic talents.
Nueva Canción has become a symbol for the Chilean poor in their fight for social justice.

For 2019, as of last week, Out of 6 Votes: 16.67% Annoying
In 2018, Out of 4 Votes: 25.00% Annoying
In 2017, Out of 8 Votes: 50.0% Annoying
In 2016, Out of 5 Votes: 60.0% Annoying
In 2015, Out of 37 Votes: 51.35% Annoying